I have no love for the Educational Testing SErvice of Princeton NJ and view them as pretty much incompetent and I've had two experiences with them in particular which left really bad tastes in my mouth.
When I went to take the graduate record exam for math majors shortly before finishing my bachelors (in mathematics), there were two parts to the thing i.e. the general GRE for everybody and then the particular test for mathematicians.
I scored about 77'th percentile on the specific math section, i.e. the part in which I was being tested against all other applicants to graduate schools in mathematics, and about 99'th percentile in the verbal part of the ordinary test, but only about 90th percentile in the math section of the ordinary test and that's the part of the story which nobody was happy about. There had been one particular single paragraph description of a situation and five or six questions based upon it in which the paragraph was utterly ambiguous; all you could do is guess and if you worked consistently, you either got all of those questions right or all wrong according to whether or not you guessed right. Of the people in my graduating class who took the test, about half got those all right and the other half all wrong.
More recently somewhere around 1989, I walked into an auditorium at Norwich Univ. which at that time ran the nation's premier Russian language immersion program and the idea was that a number of us were going to be doing ETS a favor by trying out an experimental test for state dept. people and the idea was that we were going to listen to instructions in English for about five minutes, and then take the test in Russian.
Now, this was well into the age of modern electronics; nonetheless those turkeys brought out a tape recorder from somewhere back around 1955 when tape recorders were first invented, and I was utterly unable to understand the instructions in English, and my hearing is pretty much perfect and I have no difficulties whatsoever with the English language.
At that point, I walked out of the auditorium and told the ETS turkeys what I thought of them in no uncertain terms on the way out.
I have the same gripe about the SAT and how it is used. When I took it 25 years ago, I didn't do too well in the math section. The main reason for this is I moved to another state in my junor year. They were so far behind they were learning in the 11th grade what I had already learned in the 10th. Needless to say, when I took the test I had not even learned many of the topics that were on the test. So acording to the SAT, I would fail in mathematics in college and was not suitable for college. Well, I ended up getting my BA in Mathematics and was half way through my Masters, when financial problems forced me to stop. So much for the "prediction" of the SAT :-)